Troy Hills is a census-designated place (CDP) in the township of Parsippany–Troy Hills, Morris County, New Jersey, United States. As of the 2020 census, it had a population of 5,081.

Geography

Troy Hills is in eastern Morris County, in the southeast part of Parsippany–Troy Hills Township. It is bordered to the north and west by the Parsippany CDP, to the south by Whippany in Hanover Township, and to the east by Troy Meadows, the largest freshwater marsh in New Jersey. Interstate 80 forms the northern edge of the CDP, and Jefferson Road is the western edge. Troy Hills is 6 mi northeast of Morristown and 17 mi northwest of Newark. According to the U.S. Census Bureau, the Troy Hills CDP has a total area of 2.92 sqmi, of which 2.88 sqmi are land and 0.04 sqmi, or 1.27%, are water. The community is drained by Troy Brook, which flows east into Troy Meadows and is a tributary of the Whippany River, part of the Passaic River watershed.

Demographics

Troy Hills was first listed as a CDP prior to the 2020 census.